trainer control with HR

Hi

Running the latest software and tested today using my Tacx vortex trainer. Connected fine and controlled resistance perfectly. Two issues: 1, no HR was being recorded during this. Wasn't wearing my external so had expected OHR to get used? 2, when I stopped the activity and hit resume later (in hope it would pick up OHR) the trainer options were not there anymore?

Anyone else experiencing something similar?

Thanks